YASKAWA GA800 Programming Manual page 478

2.9 L: Protection Functions
■
L8-11: Heatsink Fan Off-Delay Time
No.
Name
(Hex.)
L8-11 Heatsink Fan Off-Delay
Time
(04B7)
■
L8-12: Ambient Temperature Setting
No.
Name
(Hex.)
L8-12 Ambient Temperature
Setting
(04B8)
The drive automatically adjusts the drive rated current to the best value as specified by the set temperature. Set the
ambient temperature of the area where you install the drive to a value that is more than the drive rating.
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L8-15: Drive oL2 @ Low Speed Protection
No.
Name
(Hex.)
L8-15 Drive oL2 @ Low Speed
Protection
(04BB)
Note:
Contact Yaskawa or your nearest sales representative for consultation before disabling this function at low speeds. Frequent operation of
drives under conditions of high output current in low speed ranges may shorten the service life of the drive IGBT due to heat stress.
0 : Disabled (No Additional Derate)
The drive does not decrease the overload protection level.
1 : Enabled (Reduced oL2 Level)
When the drive detects oL2 during low speed operation, it automatically decreases the overload detection level.
At zero speed, the drive derates the overload by 50%.
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L8-18: Software Current Limit Selection
No.
Name
(Hex.)
L8-18 Software Current Limit
Selection
(04BE)
0 : Disabled
When the output current is at the software current limit value, the drive does not restrict the output voltage.
Note:
The drive may detect an oC [Overcurrent] when loads are particularly heavy or the acceleration time is particularly short.
1 : Enabled
When the output current is at the software current limit value, the drive decreases output voltage to decrease output
current.
When the output current decreases to the software current limit level, the drive starts usual operation.
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L8-19: Freq Reduction @ oH Pre-Alarm
No.
Name
(Hex.)
L8-19 Freq Reduction @ oH Pre-
Alarm
(04BF)
478
V/f CL-V/f OLV CLV AOLV
Sets the length of time that the drive will wait before it stops the cooling fan after it cancels the Run
command when L8-10 = 0 [Heatsink Cooling Fan Ope Select = Dur Run (OffDly)].
V/f CL-V/f OLV CLV AOLV
Sets the ambient temperature of the drive installation area.
V/f CL-V/f OLV CLV AOLV
Sets the function to decrease drive overload at low speeds to prevent damage to the main circuit
transistor during low speed operation (at 6 Hz or slower) to prevent oL2 [Drive Overloaded].
V/f CL-V/f OLV CLV AOLV
Set the software current limit selection function to prevent damage to the main circuit transistor
caused by too much current.
V/f CL-V/f OLV CLV AOLV
Sets the ratio at which the drive derates the frequency reference during an oH alarm.
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
YASKAWA TOEPYAIGA8002B GA800 Drive Programming
Default
(Range)
60 s
(0 - 300 s)
Default
(Range)
40 °C
(-10 - +50 °C)
Default
(Range)
1
(0, 1)
Default
(Range)
0
(0, 1)
Default
(Range)
0.8
(0.1 - 0.9)